Feature request: Add GPEN-BFR-1024 option

[swilks84]

There are subtle texture and detail improvement available using GPEN-BFR-1024 over 512 model. Managed to get the 1024 onnx model to work in Roop Unleashed with simple code edit, but don't really know what doing, and output had artifact with anything other than very high amount of blend. If simple then worthwhile. Thank you.